I just got a Boss GT-10 pedal. This one if you are not familiar: http://www.guitarcenter.com/Boss-GT-10-Guitar-Multi-Effects-Pedal-104848726-i1389286.gc

Im having a really really really hard time getting a really high, powerful, fat, but crisp and crunch gain channel out of this thing. I play in a Progressive/Technical Death Metal band so I really do need the gain. One of my friends told me distortion was a bitch to get out of this thing. Can anyone help me?